Stainless Steel Exhaust

[ivanjones]

Just found a place to make and fit a Stainless Steel Exhaust to the 3R from the turbo to the out pipe ( including class 1 cats ). This will make the engine bay look much better ( in my apinion ).
The cost is between 800 and 1000 pounds.
Is this a good price or not ?
Ivan

[monitor]

Stainless looks nice but from performance standpoint ceramic coated is much better as it holds heat inside the pipes. M400's come with black ceramic coating but 1G has headers and muflers coated in silver ceramic. Look like polished stainless but make big difference in engine bonnet temperatures. Lower IC temps, etc.

[alex s]

Quite good price, a lot cheaper than the current options!! i had mine done, and came in around that Price with high flow cats added later( but included in cost) i know it has improved performance ( rolling road) and sounds a lot better too. Standard exhaust is a crap design for a turbo car. Are you going for two seperate systems?
I would mention that Trevor from Rousch ( yellowshed) is currently developing a system, might be worth giving him a call.
HTH
Alex

[joust]

Make sure you have the car remapped if you change the exhaust. From what I know just changing the exhaust can seriously affect the performance of the car if the flow characteristics are different.

You should factor that into the cost.

J

[alex s]

Justin, would be interested to hear Trevors coments on this as Roush are looking into a new exhast system. Surley the person who wrote and tested the Noble map would know best?!?!?

[paulcundy]

joust said:

Make sure you have the car remapped if you change the exhaust. From what I know just changing the exhaust can seriously affect the performance of the car if the flow characteristics are different. You should factor that into the cost. J

Yes yes yes. Remember my new exhaust at Rockingham last year. The one that was poping and crackling and spitting flame. With the standard factory map that reduced power at the rear wheels by 27 bhp. Obviously been re-mapped since. No wonder I didn't lap everyone ;-)

Mine was a one off bespoke. Presumably anyone selling a commercial product to the wider market would offer a garuantee that the car was OK with the new exhaust?

Regards
PauL C



>> Edited by paulcundy on Wednesday 16th November 18:14

[joolski]

WARNING WILL ROBINSON !

I thought I'd add this cautionary tail to this topic.

I've recently had a new engine fitted to my car, and I took the car to John Noble Motorsports to have it all checked out. I have had a 3R exhaust fitted to my 2.5L car.

After running the car on the rolloing road (Producing over 350bhp in standard boost) they noticed that the standard fuel pump was only just managing to provide enough fuel to the engine.

This is a very BAD thing, as when the engine is running flat out, to reduce the amount of fuel will cause the engine to overheat and you will do a great deal of damage to the car.

Those of you who have raced, 2 stroke karts will know just how critical this can be.

An engine is a sum of all it's parts, if you start improving the efficiency of one part it has a knock on effect.

You have been warned !

If you do want to change things on your car, I suggest you give John Noble Motorsport a call. They have given me sterling service, and really know their stuff (they build you engine for a start!).



--Jools

[paulcundy]

Dear All,
One of the Americans noticed that he had lean running and power loss due to fuel flow problems. I think one has fitted a boost sensetive fuel pressure thingymajig whatsit.
Regards
PauL C

Jools, 350 on standard map is good. What's it doing now?

[joolski]

paul cundy said:

Jools, 350 on standard map is good. What's it doing now?

Hi Paul,

Firstly I've had a motorsport pump fitted, this will shift around 4 litres a minute, which means even at full power there is still plenty of capacity to spare.

It's still on 350bhp (.7 bar) at the moment, but I think more will be on the cards.

With the new map Pete Dibble has developed for the car, it's creamy smooth. I can recall having to 'hang on' when the boost came on in the past, now it a nice smooth delivery. Very impressed.

I'm having an intercooler upgrade in two weeks time, then I'll check the output again.

Next on the list is to upgrade the dampers and springs, then once that's done I might go back to the engine again.

After all, power is nothing without control :-)

--Jools

[yellowshed]

Responding to Alex's comment - of course we would make sure that our exhaust system keeps to the parameters set by the factory maps fo fuelling etc (after all, I did set those parameters ). I wouldn't say the factory system is crap - it does the job it was designed to do for the right cost. If people want to pay for a better system, then that is what we will provide.

Will keep you informed of progress.

Paul,

The cars already have a pressure-compensated fuel pressure regulator. Don't understand the comment from our US cousin.....

YellowShed

[lucozade]

yellowshed said:

Responding to Alex's comment - of course we would make sure that our exhaust system keeps to the parameters set by the factory maps fo fuelling etc (after all, I did set those parameters ). I wouldn't say the factory system is crap - it does the job it was designed to do for the right cost. If people want to pay for a better system, then that is what we will provide. Will keep you informed of progress. Paul, The cars already have a pressure-compensated fuel pressure regulator. Don't understand the comment from our US cousin..... YellowShed

Yellowshed - I'm interested in the new system too. Please keep us all informed as I'm sure you will.

My front manifolds is cracked and my back one has already been welded. Apparently all the dealer can do is replace both front and back. At a cost of £960+VAT. Not bad after 14000 miles and 15 months from new.

>> Edited by lucozade on Thursday 17th November 16:22